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US 11,492,509 B2Granted
Solder mask inkjet inks for manufacturing printed circuit boards
AssigneesAgfa-Gevaert, Electra Polymer Ltd.
InventorsRita Torfs, Johan Loccufier, Clive Landells, Christopher Wall
Life of this patent
Estimating the term…
Abstract
A radiation curable solder mask inkjet ink contains a photo-initiator, a polymerizable compound and a flame retardant wherewith a high quality solder mask withstanding the high thermal stress during the soldering process while maintaining excellent physical properties and flame retardancy may be produced.
Claims15
A radiation curable inkjet ink comprising:
- a photoinitiator;
- a polymerizable compound;
- and
- a flame retardant having a chemical structure according to Formula I:
- wherein
- R1 is independently selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group, and a substituted or unsubstituted aryl group;
- R2 is selected from the group consisting of OR4, a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group, and a substituted or unsubstituted aryl group;
- R3 is selected from the group consisting of OR5, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group, and a substituted or unsubstituted aryl group;
- R4 and R5 are selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group, and a substituted or unsubstituted aryl group;
- and
- at least one of R1 to R5 represents a substituted or unsubstituted aryl group.
8 more elements
Dependencies are inferred from the claim text.